A time series analysis of aggregate data on cohort and life cycle patterns in women's participation in paid work. Variables Employment rate as measured by National Insurance records. Fertility history as measured by commulated past births. Economic indicators of the state of the labour market and cohort's early experience. Educational enrolment post 15. Additional topics covered: Cohort size. Birth by parity and legitimacy. N.I. Card Exchange by employees not in employment. Summaries of educational history.